The largest sinkhole of the world is Xiaozhai Tiankeng - incredible, up to 662 m deep pit with nearly vertical walls. This is one of the most impressive natural .\r
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The largest sinkhole of the world is Xiaozhai Tiankeng - incredible, up to 662 m deep pit with nearly vertical walls. This is one of the most impressive natural .\r
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Worlds BIGGEST (and sometimes WEIRDEST) HOLES on Earth! (Including the biggest sinkhole on earth; the largest open pit mine in the world and the biggest .\r
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top 10 deepest holes in the World and Amazing Sinkholes 1. Great Blue Hole, Belize 2. Sima Humboldt (Sima Major), Venezuela 3. Dead Sea Sinkholes, Israel .